Composition for laundry bluing



Patented Sept. 9, 1930 UNITED STATES PATENT OFFICE THEOPHILE GERVAISE,SOUTHBRIDGE, MASSACHUSETTS, ASSIGNOR TO JOSEPH T. GERVAISE AND WILLIAMA. FISSETTE, BOTH OF SOUTHBRIDGE, MASSACHUSETTS COMPOSITION FOR LAUNDRYBLUING N Drawing.

will give a clean, pure white appearance to the laundered article withthe use of a minimum amount of the mixture.

Another object of the invention is to pro vide an improved mixture forlaundry bluing that Will be economical to manufacture and eflicient inuse.

Another object of the invention is to provide an improved mixture forlaundry bluing that will not stain or streak the laundered article, butwill give the desired white ap pearance with a minimum amount of themixture. 7

' Other objects and advantages of the invention will become apparentfrom the following description and it will be apparent that slightchanges in the proportions may be made Without detracting from thespirit of the invention as expressed in the following claims. I,therefore, do not wish to be limited to the exact proportions shown,said proportions having been given by way of illustration only.

It has been found from experience in the use of laundry blues that theyare liable to stain or dye the laundered articles, detracting from theirappearance and in some instances spoiling the article. Experiments anduse have shown that with my improved mixture of laundry bluing thelaundered articles when treated with the same will have a clean, purewhite appearance and that a minimum and economical quantity only of themixture is necessary for use. The mixture is simple and economical ofmanufacture and in every way desirable for the use for which it isintended.

In preparing my laundry bluing I proceed as following: First take oneounce of oxalic acid and mix this with three ounces of powdered Prussianblue and one dram of powdered ammonium chloride (apothecaries weight)with one gallon of water (rain or spring water preferred), thoroughlymix the compound and let it set for one hour, then filter, using a sandfilter preferably to make Application filed. November 5, 1927.

Serial No. 231,396.

the mixture clear and to remove the sediment. The mixture is then readyfor bottling or putting in. selected containers.

In use the oxalic acid acts as a cleaner. The Prussian blue gives thedesired color and the ammonium chloride acts as a bleach. The mixturecleans and bleaches as well as gives the desired color effect usual inthe use of bluing. In use the mixture is poured into the washing wateror solution and mixed in the usual way as bluings until the requireddepth of color is obtained; then the washed clothes or laundry is putthrough the bluing Water in the usual prior art way, being thereafterwrung out and rinsed.

Having described my invention, I claim:

1. As a new article of manufacture a bluing mixture containing Prussianblue, oxalic acid, ammonium chloride and water.

2. As a new article of manufacture a bluing mixture comprising mattermixed in the following proportions: three ounces of Prussian blue; oneounce of oxalic acid, and one dram of ammonium chloride (apothecariesWeight) in one gallon of water.

3. A composition of matter for a bluing mixture consisting of Prussianblue, oxalic acid and ammonium chloride.

4. A composition of matter for a bluing mixture consisting of one ounceof oxalic acid, three ounces of Prussian blue and a relatively smallquantity of ammonium chloride mixed with water.

THEOPI-IILE GERVAISE.

